Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

This remote sandstone cliff has one of the richest collections of Livonian petroglyph marks.

This enigmatic artifact remained buried in a churchyard for years.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

Mysterious heaps of stones dot these otherworldly woods.

This 15th-century Ottoman bridge was modified to keep up with the changing course of the river Erenik.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

The ceiling of this cavern is dripping with multicolored marble stalactites.

This stone figurine was made more than 6,000 years ago and depicts a female deity of the Neolithic Vinča culture.

A passage grave used in neolithic rituals.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

These delicate sand pyramids look like naturally occurring gothic spires.

The walls and streets of the ancient city are peppered with penises.

Europe’s oldest natural human mummy.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

Roman-era ships unearthed...